Drill bits and other downhole tools with hardfacing having tungsten carbide pellets and other hard materials

a technology of tungsten carbide pellets and drill bits, which is applied in earth drilling, cutting machines, coatings, etc., can solve the problems of high cost and difficulty in machining hard materials, erosion and/or wear resistance materials, and achieve the effect of improving performan

Active Publication Date: 2010-04-29
HALLIBURTON ENERGY SERVICES INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0008]The present disclosure provides drill bits and other downhole tools with hardfacing that may provide substantially enhanced performance as compared with prior hardfacing materials. In accordance with the present disclosure, such hardfacing may include tungsten carbide particles formed with an optimum amount of binding material having a weight percentage between approximately three percent (3%) and less than five percent (5%) of each tungsten carbide parti

Problems solved by technology

Since machining hard, abrasion, erosion and/or wear resistant materials is generally both difficult and expensive, it is common practice to form a metal p

Method used

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  • Drill bits and other downhole tools with hardfacing having tungsten carbide pellets and other hard materials
  • Drill bits and other downhole tools with hardfacing having tungsten carbide pellets and other hard materials
  • Drill bits and other downhole tools with hardfacing having tungsten carbide pellets and other hard materials

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Embodiment Construction

[0029]The preferred embodiments and their advantages may be best understood by referring in more detail to

[0030]FIGS. 1-11 of the drawings, in which like numerals refer to like parts.

[0031]The terms “matrix deposit,”“metallic matrix deposit” and / or “hardfacing” may refer to a layer of hard, abrasion, erosion and / or wear resistant material disposed on a working surface and / or substrate to protect the working surface and / or substrate from abrasion, erosion and / or wear. A matrix deposit may also sometimes be referred to as “metallic alloy material” or as a “deposit matrix.” Various binders and / or binding materials such as cobalt, nickel, copper, iron and alloys thereof may be used to form a matrix deposit with hard, abrasion resistant materials and / or particles dispersed therein and bonded thereto. For example, various types of tungsten carbide particles having an optimum weight percentage of binder or binding material may be included as part of a matrix deposit or layer of hardfacing ...

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Abstract

A hardfacing is provided to protect surfaces of drill bits and other downhole tools. The hardfacing may include tungsten carbide particles or pellets formed with an optimum weight percentage of binding material and dispersed within and bonded to a matrix deposit. The tungsten carbide particles may be formed by sintering or other appropriate techniques. The tungsten carbide particles may have generally spherical shapes, partially spherical shapes or non-spherical shapes.

Description

RELATED APPLICATION[0001]This application claims the benefit of previously filed provisional application entitled “Drill Bits And Other Downhole Tools With Hardfacing Having Tungsten Carbide Pellets And Other Hard Materials” Ser. No. 60 / 934,948 filed Jan. 8, 2007.TECHNICAL FIELD[0002]The present disclosure relates in general to downhole tools with hardfacing having tungsten carbide pellets and other hard materials dispersed within a matrix deposit and, more particularly, to hardfacing having tungsten carbide pellets formed with an optimum percentage of binding material.BACKGROUND OF THE DISCLOSURE[0003]Since machining hard, abrasion, erosion and / or wear resistant materials is generally both difficult and expensive, it is common practice to form a metal part with a desired configuration and subsequently treat one or more portions of the metal part to provide desired abrasion, erosion and / or wear resistance. Examples may include directly hardening such surfaces (carburizing and / or nit...

Claims

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Application Information

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IPC IPC(8): E21B10/08E21B10/50E21B10/00E21B10/46E21B10/48E21B10/54E21B10/26B05D1/00
CPCB22F7/062B22F2998/00B22F2999/00C22C29/08C22C2204/00C23C30/005E21B10/46C22C26/00B22F3/15
Inventor BIRD, JAY S.
Owner HALLIBURTON ENERGY SERVICES INC
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